Metal cover for tanks



May

w. W. FORD METAL COVER POR TANKS @WT/52mm Milka/,z Wfo'fx v May zu, 1924. 494,780

l YW. W.`FORD METAL COVER FOR TANKS Filed May 9. 1923 2 sheets-Sheer 2 ma l 1N VEN TOR Patented May 20, 1924.

tiene@ i UNITED STATESl PATENT'o'FFlcEt.

WILLIAM w. FORD, or PHILADELPHIA,'PENnsYLvAnIAJ* METAL COVER FOR TANKS.

Application led May 9,

To all whom t may conce/m v Ee it known that I, WILLIAM WV. FORD, la citizen of the United States, residing at 200- East Tabor Street, Philadelphia, in the county of Philadelphia and State of Pennsylvania, haveinvented new and useful Improvements in a Metal Cover for Tanks, of which the following is av specification( My invention relates to new and useful improvements in a metaly cover for tanks, and has for its primary4 object to perceptibly improve the construction of the structure set forth in my application for Letters Patent bearing Serial Number 553,843,V dated April 17th, 1922. I f i yAnother object of my present invention is to providel supporting means for the ends of the T-iro-n rafters which are adaptable to different inclinatio-ns of said rafters.

A further object of this invention ist'o provide, in combination, a bracket and a swinging stirrup journalled or p-ivotally mounted in said bracketv for adjustment t'o adapt it to the inclination of an associated rafter. 4

A still further object of the invention is toprovide a crown supporting p-latehaV-- ing a plurality of sockets for the reception of the upper ends ofrafters.' v f With these ends in view, this invention consists in the details of construction and combination of element-s hereinafter set forth and then vspecifically designated-by theclaims. ffm

In order that those skilled in the ,art to which this invention appertains, may understand howY to make and use the same, I will describe its construction in detail, referring byy numerals' to the accompanying drawings forming a part of this application, in which I Fig. 1, isfa vertical sectional View of a cover constructed in accordance with my invention and showing it in connection with a tank, a ortion of which is broken away.

Fig. 2, 1s an enlarged plan view of they crown supporting plate.

F ig. 3, is a sectional view thereof.

Fig. 4, is a sectional side elevation of one of the stirrups and its bracket mounted on a section of a tank.

Fig. 5, is an end view of the same removed from the tank.

In carrying out my invention as herein embodied, 2 represents a tank of any suitable or well known construction and made 1923. Serial No. 637,911.

of wood, metal;r or lother gsuitable material.

The upper-open endr ofthe-tank is closed by a top y3 disposedacross the yupper edge and preferably flush with the `outer surfacel of-theside walls and'said top ,is-` generallyv Supported byfw beam 4 lsuitably connected with the saidsi'de wallsof the tank. l

Fastened tolthyertop 3, centrally thereof, isa `pipe flange 5 orifits equivalent, to which is l, attached the tubular-.king post 6 rising' any desirable,height` above the topl 3H to provideL lapproper pitch for the cover. The

upper-end of theking ipost is eXteriorly.

the Areception of theinner oruupperqendsof 'the rafters r` 179g` which jare preferably formed from T-virons, The socketsare open only at the tops. .and-Outer ends, thus providingwalls toj vassist inthe supportof the.

inner ordupperuend of said vrafters vwhich are further f Supported byl suitable ysecuring means, fsuch'as bolts, linserted in the'holes 15, inthe, side walls ofthe ears andpassinvgthrough thegraftersi; f.

he lower end ofeachrafter is adapted tolb'efinserted inthe recessl` of. astirrup l fwhichfhas' Aja bottomf'wall -18 tosupport theraftergand anend wall ,lQJto assist in taking npganyiendwsethrust .ofthe fatter, the'. latter being,- heldf in .the stirrup by Silitable securing means, such as boltsf,inserted in holes 2Q inA the, -sidje walls and 5. passing throu-gh the rafters. The stirruphas an integral fin 21 depending therefrom which is preferably lof triangular shape and the inner edge of said n forms an obtuse angle with the bottom wall of the stirrup and said inner edge of the in has a notch 22 for registration with the upper hoop 23 of the tank. The lower end olf the fin carries a pair of oppositely projecting trunnions 24. n

These trunnions 24 are mounted or journalled in the spaced hooks 25 extending above the upper ed e of the bracket 26 having holes 27 theret rough for the passage of fastening devices 28 to secure the bracket to the tank. This arrangement permits the stirrups to be moved toward or away from the tank to change the inclination thereof so as to accommodate the different inclined positions of the rafters. Y

. Between the rafters are located the segmental cover plates 29 which are supported by `said rafters, being secured thereto in a manner specified in the application above referred to or in any other suitable way.

On the upper end of the king post is mounted a ,frusto-conical hood 30 which forms the apex of the cover and bridges the space between the upper ends ofthe rafters and segmentalplates so asto close this open space and-protect the joints between the dif-- ferent parts. This hood is held in place by a=nut 3l having-threaded engagement with the king post. 'The kingy post is surmounted by a frusto-conical cap 32having a sleeve 33 snugly `fitting the bore of the king post.

Fromv the foregoing it will be obviousv that I have provided exceedingly simple and effective rafter supports which may be readily adapted to the diiferent inclinations of theA rafters thus overcoming the necessity of providing special supports `for covers of different pitch.

vOf course I dono-t wish to be limited to the exact details of construction-as herein shown as these may be variedwithin the limits of the appended claims without departing from the` spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is l. A support for the lower end of a tank cover rafter, comprising a stirrup closed on two sides, one end and the bottom, a fin projecting 4from the bottom thereof and trunnions at the lower end ofthe iin. i

2. A support for the lower end of a tank cover rafter, comprising a stirrupclosed on two sides, one end and the bottom, anv integral fin depending from the bottom of the' stirrup, the inner edge of said lin forming an obtuse angle with the bottom of the stirrupy andvhavingy a notch therein and oppositely projecting-trunnions at the lower end of said iin.

3. 'A support for the lower end of a tank cover rafter, comprising a stirrup closed on .mounted on the tank top, a rafter supporting member on said king post, adjustable rafter supporting members on the tank to correspond to the inclination of the rafters, rafters having their ends set in the several supporting members, and cover plates secured to the rafters.

5. The herein described combination with a tank, a king post supported bythe top of said tank, a plurality of brackets secured to the exterior surfaces of the side wallsiand spaced adjacent the top of the tank, spaced hooks formed with said brackets, a stirrup for each bracket, a fin lformed with each stirrup, oppositely projecting trunnions carried by the lower end of the fin, the trunnions being mounted or journalledr in 'the hooks of the brackets,a crown plate mounted on the -king post, means for adjusting the height of the crown plate, a plurality of spaced ears formed about the circumference of the crown plate and adapted to alignwith the dierent stirrups, said ears having sockets, rafters mounted in the sockets of the ears In testimony whereof, I havek hereunto 100 affixed my signature.

y WILLIAM W. i FORD. 

